DenseLinAlgPack_random_vector.cpp

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00002 // ***********************************************************************
00003 // 
00004 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
00005 //                  Copyright (2003) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
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00024 // Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
00025 // 
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00028 
00029 #include <stdlib.h>
00030 
00031 #include <stdexcept>
00032 
00033 #include "DenseLinAlgPack_random_vector.hpp"
00034 #include "DenseLinAlgPack_DVectorClass.hpp"
00035 
00036 void DenseLinAlgPack::seed_random_vector_generator( unsigned int s )
00037 {
00038   srand(s);
00039 }
00040 
00041 void DenseLinAlgPack::random_vector( value_type l, value_type u, DVectorSlice* v )
00042 {
00043   if(!v)
00044     throw std::invalid_argument( "random_vector(...) : Error, "
00045       "v can not be NULL" );
00046   if( l > u )
00047     throw std::invalid_argument( "random_vector(...) : Error, "
00048       "l can not be greater than u" );
00049   for( DVectorSlice::iterator itr = v->begin(); itr != v->end(); )
00050     *itr++ = l + (double(rand())/RAND_MAX) * (u -l);
00051 }

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